Is it normal to keep wanting to sleep after having IVSM?

I finished my infusion on wednesday. Yesterday, I think I was fine, felt really good...had lots of energy. Things were feeling great.

Today, my eyes dont want to stay open, I keep wanting to sleep. I feel like I did when I hit puberty (umm...that part probably has nothing to do with the steroids) I feel stoned. No energy. Attention span is fubar.

I feel so wiped out. Like I did when I was recovering from mononucleosis.

The back of my neck hurts too.